After the release of iOS 8, Apple may have received too many user feedback about the bug. In order to make the official version more stable, Apple decided to provide some users with the latest version of iOS public beta for trial, collect various bug information and then launch the official version to users. This will be the first time Apple has launched the public beta version of iOS, The functions of the public beta version are basically the same as those of the developer version. IOS 8.3 supports wireless CarPlay, and has a new Emoji keyboard to enhance Siri voice and other functions. The next iOS 8.4 will develop a new streaming media service.